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Single Acting Pneumatic Actuator: Working Principle, Advantages, and Applications
Release date：2025/6/30
1. Introduction
A single-acting pneumatic actuator is a mechanical device that converts compressed air energy into linear or rotary motion in one direction, relying on an internal spring or external force to return to its original position. These actuators are widely used in applications where simplicity, cost-effectiveness, and fail-safe operation are critical.
This article explores the working principle, advantages, disadvantages, and key applications of single-acting pneumatic actuators, along with a comparison to double-acting models.
2. Single Acting Pneumatic Actuator Working Principle
A single-acting pneumatic actuator consists of:
Cylinder housing (contains the piston)
Piston (moves under air pressure)
Single air inlet port (for compressed air supply)
Spring mechanism (returns the piston when air is released)
Piston rod (transmits motion to the load)